D'Addario Helicore Orchestral Bass Single E String, 3/4 Scale, Medium Tension 3/4 size bass with a playing length of 41 3/4 inches (1060mm) Medium tension Stranded steel core provides optimum playability and produces a clear, warm tone Optimized for arco use All D'Addario strings are designed, engineered and manufactured in the USA to the most stringent quality controls in the industry